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Finding the Fourth Proportional to 439.33, 606.60 and 308.51

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Solution

The fourth proportional to 439.33, 606.60 and 308.51 is: 425.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.33 : 606.60 = 308.51 : x
  2. Step 2: Convert to fraction form
    439.33/606.60 = 308.51/x
  3. Step 3: Cross multiply
    439.33x = 606.60 × 308.51
  4. Step 4: Simplify right side
    439.33x = 187,140.62
  5. Step 5: Solve for x
    x = 187,140.62/439.33
  6. Step 6: Final answer
    x = 425.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.